Finding the Fourth Proportional to 11,211.82, 16,818.03 and 4,638.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,211.82 : 16,818.03 = 4,638.47 : x
2. Step 2: Convert to fraction form
   11,211.82/16,818.03 = 4,638.47/x
3. Step 3: Cross multiply
   11,211.82x = 16,818.03 × 4,638.47
4. Step 4: Simplify right side
   11,211.82x = 78,009,843.52
5. Step 5: Solve for x
   x = 78,009,843.52/11,211.82
6. Step 6: Final answer
   x = 6,957.82